build: bump libbson

Christian Hergert · Christian Hergert · commit 74362530b4a4 · 2014-06-18T01:57:01.000-07:00
diff --git a/src/libbson b/src/libbson
@@ -1 +1 @@
-Subproject commit 3f964c5bea6f8937a678d62534e39d638456375a
+Subproject commit be892a87c5706895508dbc6123ed8ce722c239e5
